.addinput {
  position: relative;
  padding: 10px 0;
  background-color: rgb(42, 108, 231);
}
.addinput h2 {
  margin: 0;
  display: inline-block;
  position: absolute;
  color: white;
}
.addinput input {
  box-sizing: border-box;
  width: 600px;
  height: 35px;
  border-radius: 8px;
  outline: none;
  padding: 5px;
  border-width: 1px;
  font-size: 16px;
  margin-left: 50%;
  transform: translateX(-50%);
}
